These Incredible Gravity Defying Things Will Make You Look Twice

Law of Universal Gravitation

The effect of gravity was first explained mathematically by Isaac Newton -- the famous story being that the Universal Law of Gravitation is the product of Newton watching an apple fall from a tree. While this may not be the exact circumstance under which he developed his Universal Law of Gravitation, it is certainly the reason people are able to understand the force of gravity and its relationship to the masses of bodies and distances between them.